Fluid-pressure regulator.



No. 70l,089. Patented May 27, [902 W. M. REASON.

FLUID PRESSURE REGULATOR.

(Application filed Mar. 29, 1.901.)

(llo Model.)

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UNiTnio STATES PATENT OFFICE.

WALTER M. REASON, or PONTIAC, MICHIGAN.

FLUID-PRESSURE REGULATOR.

SPECIFICATION forming part of Letters Patent No. 701,089, dated May 27,1902.

Application filed March 29, 1901. Serial No. 53,382. (No model.)

To all whom it may concern:

Be it known that I, WALTER M. REASON, a citizen of the United States,residing a Pontiac, county of Oakland, State of Michigan,

' have invented a certain new and useful Improvement in Fluid-PressureRegulators; and I declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it pertains to make and use the same, reference being hadto the accompanying drawings, which form a part of this specification.

This invention relates to fluid pressure regulators, and has for itsobject afiuid-pump which is intended to be used to produce pressure fora fluid-receptacle and to regulate the pressure therein, keeping itpractically constant.

The regulator comprises an air-pump and parts connected therewith bymeans of which it is itself brought into actuating engagement with amoving part that is constantly moving and which serves to actuate thepump periodically whenever the pressure drops below that which theapparatus is adjusted for. The moving part of the engine, which is inconstant motion, is shown in this case as a pitman actuated by aneccentric, and on this pitman is a hook, which at times engages with aspring -hook on the rod of a piston, and while the engagement betweenthe two hooks continues the piston reciprocates and the pump compressesair into the storage-receptacle. As soon as the desired pressure hasaccumulated in the storage-receptacle the two hooks are disengaged andthe pump ceases to act, although the eccentric and pitman continue inaction.

In the drawings, Figure 1 is a sectional elevation. Fig. 2 is a plan.Fig. 3 shows a modification.

A indicates the pump-cylinder, in which the piston B is arranged toreciprocate, cornpressing air in front of it, which passes by thecheck-valve 1 into a pipe 2, that leads to the storage-receptacle.Abranch pipe 3 leads to the intake end of the cylinder, and within thatpart of the branch pipe 3 which extends toward the intake end of thecylinder is pro vided a small piston l, arranged in any suitable way tobe air-tight in the cylinder, in which it acts, and having behind it apistonrod 5, an adjusting screw-plug 6, and a regulating-spring 7.

Lengthwise of the piston-rod Set the pistonB extends a spring 9, whichlies in a longitudinal groove or channel 21 in the pistonrod and on thespring bears the end of the small piston-rod 5. The small piston-rod 5is provided with a f riction-roller 10 atits bearing-point.

The cylinder A is mounted on any suitable support (not shown) and at oneside of it is provided with a guide 11, in which a reciprocatingslide-arm 12 travels. The arm 12 is actuated by a pitman 13 from aneccentric 14, the pitman being connected to the slide by a wrist-pin 15.The slide 12 has an arm 16, that extends into' the path of thepiston-rod 8 and .is adapted to engage against the'end of the piston-rod8. A hook 17 reaches from the aru116 over the piston-rod S, and when thehook 9 and the hook 17 are in engagement the slide 12 and the piston-rod8 travel together, both on their instroke and their outstroke, andinconsequence of the motion given to the piston the air'is compressed intothe storagetank andintoithe branch pipe 3 until finally an amount ofcompression has been produced sufficient to force the small piston 4against the spring 7 and the end of the piston-rod 5 against theupperside of the spring-catch 9. The pressure acting on the spring-catch 9serves to disengage 'the two hooks, and thereafter'the slide 12continues to reciprocate, but the piston 8 remains stationary; but ateach stroke of the slide 12 the hook 17 passes into a position to engagewith the hooked end of the spring 9 and does make such engagement assoon as the pressure of the storagetank has been reduced to such anextent that the'small piston 4 rises under the actuating influenceof thespring 7. As soon as this happens the hooks engage, the pump is againput in action, and the air-pressure in the storage-tank is again broughtabout.

In the form shown in Fig. 3 the spring 7 is removed, and the spring-hook9 acts in place of it. A block 20 is placed in the channel 21,

and the eitective strength of the spring 9 is regulated by changing theposition of the block. The block is held in its adjusted position by ascrew 22.

- What I claim is 1. The combination of an air-pump, a reciprocating armadapted to engage the airpump piston-rod to produce an instroke, acatch, a part of which is on said arm and the other part upon saidpiston-rod, one part of said catch being movable relative to the partupon which it is located, said parts of said catch being adapted toengage each other to secure said reciprocating arm to said piston, andmeans controlled by the airpressure adapted to act directly on the saidrelatively movable part of said catch to disengage it from the other.

2. In combination with an air-pump and its piston, a grooved piston-rod,a hooked spring extending lengthwise in said groove, a reciprocatingslide provided with a hook adapted to engage the hooked spring, meansfor producing reciprocation of the slide, a disengaging device arrangedto be actuated by the pressure of air produced by the pump and adaptedto disengage the two hooks, substantially as described.

3. In combination with an air-pump and its piston, a spring lyinglengthwise the pistonrod, means for reciprocating said piston-rod, asliding block arranged to engage under the spring and between it and thepiston-rod, and to regulate the tension of said spring, substantially asdescribed.

4C. In combination with an air-pump and its piston, a spring lyinglengthwise the pistonrod, means for reciprocating said piston-rod, asliding block arranged to engage under the spring and between it and thepiston-rod, and to regulate the tension of said spring, and means forholding said block in place, substantially as described.

In testimony whereof I sign this specification in the presence of twowitnesses.

WALTER M. REASON.

Witnesses:

CHARLES F. BURTON, MAY E. KOTT.

